Several factors can contribute to decreased engagement:
1. Poor List Quality: Sending emails to unengaged or uninterested recipients. 2. Irrelevant Content: Content that doesn't resonate with your audience. 3. Frequency Issues: Sending emails too frequently or not frequently enough. 4. Email Design: Unappealing or hard-to-read email designs. 5. Deliverability Issues: Emails ending up in spam folders.